题干
—It's so late. Why not write the report tomorrow?
—But I don't know _______ I can do it if not now.
A：why
B：when
C：how
D：where
答案(点此获取答案解析）
B
—It's so late. Why not write the report tomorrow?
—But I don't know _______ I can do it if not now.
A：why
B：when
C：how
D：where
线如右图所示。下列说法正确的是 （ ）